package com.sayice.gomoku.web;

import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.lang.reflect.Method;

/**
 * 处理请求
 */
public abstract class BaseServlet extends HttpServlet {
    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws IOException {
        this.doPost(req, resp);
    }
    
    @Override
    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws IOException {
        req.setCharacterEncoding("UTF-8");
        resp.setContentType("text/html; charset=UTF-8");
        String action = req.getParameter("action");
        try {
            // 根据 action 获取对应的业务方法反射对象
            Method method = this.getClass().getDeclaredMethod(action, HttpServletRequest.class, HttpServletResponse.class);
            method.invoke(this, req, resp);
        } catch(Exception e) {
            e.printStackTrace();
            // 将异常抛给 Filter 过滤器
            throw new RuntimeException(e);
        }
    }
}
